Comcast’s move this week to put its entire cable TV bouquet into an app – could mean it is within a hairs breadth of moving beyond its broadband footprint, and taking on an entirely new business model for video. This first step is to offer an “X1-like experience” outside of the home – not just on mobile devices and laptops, but on the road, so potentially when customers are on non-Comcast broadband lines. This represents Comcast hammering another nail into the coffin of traditional cable TV in the US market – partially accepting the premise that the only value left in cable is broadband, not video – but it wants to hang on to its video customers and even attract…